Electric-light fixture.



T. SMITH.

ELECTRIC LIGHT FIXTURE.

APPLICATION FILED norm, 1904.

Patented Sept. 7, 1909. I

asses v l W LII UNITED STA- TES PATENT onirica.

THEODORE SMITH?,- F CHICKGD', ILLINOIS, ASSIGNB) '12.0 THEO'. SMITHMANUFAC- TUBING COMPANY, 0F CHICAGO, ILLINOIS, A GORPOBATION 0FILLINOIS.

ELECTRICLLIGHT FIXTURE.

Specification of Letters Patent.

yPatented Sept. 7, 1909;

, cago, in the county of `Coolr and State of Illinois, have invented a'certain new 'and useful Improvement in Electric-Light Fixtures, of whichthe following' is a specification.

My invention relates to electric light fixtures, and has for its obj-ectto provide` a new and improved device of this description.-

My invention is illustrated in the accompanying drawings, wherein-Figure l is' al side elevation of one form of .v the fixture; Fig. 2 isa view showing the end of the member carrying the lamp and is connected;Fig. 3 is a sectional view through a portion of the member carrying thelamp; Fig.l e is a sectional view takenon line 4-4 of Fig. 5; F ig. 5 isa sectional-y .view'talen on line 5 5 of Fig. l.

Lilie' letters refer to-like parts throughoutthe several figures.

The particular device herein show-n is adapted to be mountedI upon abase, A, al

though it is, of course, evident that it could be attached to anysupport. This base is provided with a hollowcylindrical part, B,provided at its end with a sleeve, D, said sleeve being providedI with abushing, E. Slidably mounted in the cylindrical part B is a tube, F,which is held in any desired position by the screw G. The sleeve D isprovided with a slot, d, through which the screw Gr passes, the screwbeing loose in said slot so that the tube F and the parts asso- 'ciatedtherewith may be rotated after the screw is tightened. This slot extendspreferably about half way around the sleeve so as to give a rotarymotion of 18()o to the tube F. This screw holds tliebushing E in placeas,it passes therethrough, and at the same time when tightened holds thetube F from longitudinal movement, but permits rotary movement thereof,the screw at the saine time limiting the rotary movement by striking theedges of the slot d. The tube F is provided at its end with an engagingpiece, F1, having sides, f. A tube H is associated with the tube F, andis provided with a through whichI the electrical conductor can bepassed. 4The part F1 is provided with projecting lugs f1 to which ispivotally connected a rod I adapted to be clampedv be'- tween its endsto the tube H' in any suitable 60 manner', as by meansl of the part H2and the screw 1v1' and' clamping piece 71,2. This clampingd'evice istightened up so as to produce enough friction to hol'd the part H of thejointe-d arml in any position to which it may 55 be' moved', althoughsaid arm can be moved toI various positions by applying pressurethereto, the rod" sliding in the clamping device under such conditions.The end 'of this rod isl free, as shown. The lampl socket is connected'with' the tube H by means of a joint which permits the tube to be movedto various positions. The socket has connected thereto a part, K, whichypassesbetween the arr'ns of a= bifurcated end piece, J, attachedl 75 tothe tube A thumb screw la passes through the parts', and is adapted whentightened to vhold the lamp socket in any desired position. 'Theconductor C for the light passes up through the cylindrical part 8o Band the tubes F and H, so as to be concealed therein and' protected4thereby. It will' be seen that by this construction there are variousadjustable parts which permit the lampy to be moved to variouspositions. S5 The limit-ation on the rota'tfionl of the lampsupporting'pa'rft` prevents the conductors from becoming too greatlytwisted. It willthus be seen that a very great range if movement issecured by these various parts, and that this movement is obtainedwithout danger of injuring the conductor. By having the rod I with itsend free, such free end can move as the rod is slid in theclampingdevice so as to relieve the rod of the lateral strain. If, for example,the rod was connected at its end to some part, there would be a lateralor bending strain produced when the rod was slid, and the rod bent outof alinement. This is obviated by leaving the end free, as shown.

I have shown a particular construction wherein the supporting part,comprising the tubes F and H, is curved and of a particular"construction, but it is, of course, evident that the end of the rod Ibeyond the part H:2 is in free, this movement can take place, therebeing suflicient spring in the rod to permlt it. It is not necessary tohave play of the rod in the projection Il, for said rod `tits tightly insaid projection in order to hold the parts in any position to which theyare moved.

I claim:

l. A fixture comprising a lamp socket, two

i. curved supporting parts therefor' pivoted together end to end, a rodpivoted to one part and frictionally clamped to the other part so as tohold said parts in position to torni a continuous curve.

2. A iixture comprising a lamp socket, a tube to which it is connected,a supporting part to which said tube is pivotally connected, a rodhaving two points of attachment, one a pivotal connection to saidsupporting part and the other a frictional connection to said tube, saidrod having its projecting end free so as to adjust itself to the variousrelative positions of the tube and the supporting part.

3. A fixture comprising a lamp socket, a hollow tube to which it isconnected, a support to which said tube is pivotally attached, aconductor contained wlthin said tube, a rod pivotally connected to saidsupport and extending in proximity to said tube, a projection on saitube provided with a clamping part throu h which the end of the rodprojects and W ich clamps the rod so as to hold the tube in any givenposition and yet permit movement of the tube when force is appliedthereto, the end of said rod being free so as to relieve the rod oflateraly strain when the relative position of the tube and the supportis varied.

4:. A fixture comprising a hollow cylindrical part, a supportingl deviceprojecting E otcd to said enfrafrin iece and the en a? z: n 7

therein, a bushing surrounding the supportg device and projecting intothe cylindrical part, said cylindrical part having an elongated slot, ascrew in said slot adapted to lock the bushing and support together,said screw being free to move sidewise in the slot to permit rotation ofthe support.

5. A fixture comprising `two hollow tubes pivotally connected together,an engaging piece at the end of one tube to which the other tube ispivotall connected, a laterally projecting lug on said enga ing piece, arod pivotally connected to said ug, said rod being rictionally connectedwith t-he tube ivio said rod being tree.

6. A fixture comprising a hollow cylinj drical part, a tube adjustablymounted therein, means for holding said tube against longitudinalmovement, a second tube pivoted to the iirst tube and in alinementtherewith, a rod pivotally connected with said irst tube andfrictionally connected with the second tube, an electric light socketpivotally connected with said latter tube and a conductor passing throuh said tubes to said socket.

7. A light Xture comprising two hollow tubes provided with curved parts,the ends ofthe curved parts being pivoted together so as to be inalinement to form a continuous curve, a projection on each of saidtubes, a rod having one end pivoted to one of said projections and theother end projecting through the other projection, and a clamping deviceassociated with said latter projection to clamp the rod but arranged soas to permit the sliding of the rod when the one tube is movedabout itspivotal connection with the other.

THEODORE SMITH.- Witnesses-z HOMER L. KRAFT, PERoIvAL W. TRUMAN.

